34results about How to "Timely inspection and maintenance" patented technology

The invention discloses a ship vibration energy acquisition and intelligent monitoring device based on a frictional nano-generator, which comprises a base, a frictional nano-generator, an integrated circuit and a display screen, and is characterized in that the frictional nano-generator comprises a spring, a silicone model, an upper electrode, a lower electrode and a wire, and has dual functions of performing frictional power generation and converting vibration signals into electric signals. The ship vibration energy acquisition and intelligent monitoring device does not need a battery or an external power supply, and can provide power for sensors thereof continuously. The ship vibration energy acquisition and intelligent monitoring device can operate with a small amount of electric energy, thereby not only reducing resources and energy consumed by manufacturing the battery, but also being capable of reducing the waste of electric power and realizing self power supply. The ship vibration energy acquisition and intelligent monitoring device can calculate the frequency and amplitude of ship vibration according to the output voltage waveform of the generator, and forms comparison with the vibration frequency under a normal operating state of the ship so as to monitor abnormal vibration, thereby facilitating the ship management staff to timely inspect and maintain abnormally vibrating electromechanical equipment of the ship, and realizing visualization of the ship vibration.

The invention provides an audio-video-heat integrated anomaly detection and alarm method based on artificial intelligence. The method comprises the following steps: 1, collecting the temperature, sound and image data of a capacitor and a reactor, and carrying out the 24-hour uninterrupted data collection of a reactive electrical device of a power transformation and distribution station through a medium-wave infrared detector, a directional sound pickup and a high-definition video camera; step 2, by analyzing the thermal imaging picture, denoising the sound by using a clustering method, and comparing the deformation of the video image, the preprocessing of the audio, video and thermal information is achieved; 3, according to the three types of data anomalies, abnormal state recognition is conducted through a fuzzy neural network method, and the collected data are subjected to classified macroscopic judgment and output; and step 4, comprehensively considering three types of data anomalydetection results to form a comprehensive criterion and an early warning threshold, and further formulating a corresponding intelligent early warning mechanism. The method has an efficient and accurate anomaly detection alarm effect, can reduce the labor cost, and facilitates the development of unmanned safe operation of the power transformation and distribution station.

The invention relates to a multi-parameter fiber grating sensing pipeline health monitoring system, which includes a fiber grating sensor, a junction box, a grating fiber optic demodulator, a data processing system and an online monitoring system, and optical fibers are installed at key nodes of pipeline main lines and branch lines Grating flow sensor, fiber grating pressure sensor installed near the valve and elbow of the pipeline, for the unburied pipeline, install the fiber grating acoustic emission sensor on the outer wall of the pipeline near the valve and elbow, and install the fiber grating acoustic emission sensor on the outer wall of the pipeline in the axial direction Fiber Bragg grating strain sensors arranged around the circumference are installed at intervals to monitor the stress distribution of the outer wall of the pipeline when there is no leakage and the strain on the outer wall of the pipeline caused by negative pressure waves when there is leakage. For buried pipelines, fiber gratings are arranged around the pipeline to measure temperature For optical cables, fiber grating anti-intrusion optical cables are laid above the pipeline. The system can monitor various parameters and judge various health states of the pipeline, and the accuracy of leakage judgment is high.

The invention relates to a monitoring system, in particular to a hydraulic oil pollution monitoring system. The hydraulic oil pollution monitoring system comprises an oil tank, a first hydraulic pump, a first analysis processing device, a second analysis processing device, a filter device and a main oil pipe. The main oil pipe is connected with the oil tank, the oil tank is connected with the first hydraulic pump, the first hydraulic pump is connected with the first analysis processing device, one end of the filter device is connected with the first analysis processing device, the other end of the filter device is connected with the second analysis processing device, and the second analysis processing device is connected with the main oil pipe. The hydraulic oil pollution monitoring system has the advantages that the system is easy and convenient to operate, the oil pollution condition can be monitored in real time and can be processed, and equipment can be inspected and maintained in time.

The invention discloses a distributed Bayesian online fault diagnosis method for dynamic and static information of a megawatt ultra-supercritical unit. The distributed Bayesian online fault diagnosismethod aims at the problem that fault types of the megawatt ultra-supercritical unit is difficult to distinguish due to diversification of fault information, and comprises the steps of adopting a Bayesian network classifier to capture the static information of faults; extracting the dynamic information of the faults by combining with a slow feature analysis algorithm; and finally, utilizing the dynamic and static fault information to construct an online fault diagnosis model for improving the accuracy rate of fault diagnosis. The distributed Bayesian online fault diagnosis method overcomes theproblem of insufficient extraction of the fault information caused by excessive variables of a large-scale coal-fired unit, effectively solves the problem of difficult online diagnosis of faults comprising diversified dynamic and static fault information, greatly improves the online diagnostic performance of the indistinguishable unit faults, and facilitates a thermal power plant to check and repair the factory effectively and timely, thereby ensuring the safe and reliable operation of the megawatt ultra-supercritical generating unit.

The invention discloses an intelligent fishery farming system based on Internet of Things. The system comprises a data acquisition module, a farming regulation and control module, a database, an Internet of Things service platform, a caution module, an operation monitoring module and an intelligent terminal, the data acquisition module comprises a temperature acquisition unit, a humidity acquisition unit, a brightness acquisition unit, a PH value acquisition unit and an oxygen content acquisition unit, and the farming regulation and control module comprises a water temperature control unit, anoxygenation control unit, a water change control unit and a brightness regulating unit; and the system can perform data acquisition on multiple environmental conditions of a farming area, can monitorrunning statuses of the data acquisition equipment and the farming regulation and control equipment, can regulate and control a water temperature, brightness, an oxygen content and a pH value of thefarming area, can timely find and handle problems and can timely know specific data information of the farming area. The invention also provides an application method of the intelligent fish farming system based on the Internet of Things, and the application method is convenient and quick to operation and easy to popularize.

The invention discloses a control system for a servo motor test device. The control system comprises a performance test module, a data monitoring module, a database, a cloud platform, a motor controlmodule, a warning module and an intelligent terminal; the performance test module comprises an electrical performance test unit and a mechanical performance test unit; and the data monitoring module comprises an operation monitoring unit, a temperature monitoring unit, a humidity monitoring unit, an image monitoring unit and a video monitoring unit. With the control system adopted, various electrical and mechanical properties of a servo motor can be tested; the operating status, temperature and humidity data, image and video data of the servo motor can be monitored; analysis, processing and comparison can be performed on the data; a basis for the analysis and comparison of the monitoring data is provided; and comprehensive analysis and judgment can be performed according to the comparisonresults of the servo motor and the test device. The invention also provides a use method of the control system for the servo motor test device. The use method is convenient and quick to operate and isconvenient to popularize.

The invention discloses an alarming type pipe flame arrester. The flame arrester comprises a main flame arresting pipe; one end of the main flame arresting pipe is fixedly connected with one end of a transition pipe section through a variable-diameter connecting pipe; a first flame arresting core and a second flame arresting core are arranged inside the main flame arresting pipe; the outer side of the first flame arresting core and the outer side of the second flame arresting core are fixedly connected with explosion-proof rings; a flame detector penetrates through the middle of the second flame arresting core; an alarm is arranged at the top end of the main flame arresting pipe; a control mainboard is arranged inside the top end of the flame detector; and a metal connecting pipe is arranged in the middle of the flame detector. According to the flame arrester, the multi-section type pipe flame arresting structure replaces the traditional equal-diameter structure, the flame arresting effect is effectively improved through multiple diameter changes, the structures of the flame arresting cores are stabilized through design of the explosion-proof rings, pipe damage caused by thermal deformation of the flame arresting cores is prevented, the early warning and alarming functions are realized through flame detection, the safety of the flame arresting process is guaranteed, damage to the pipe infrastructure is reduced, and the flame arrester is efficient and safe.

The invention discloses a rotation display base. The base comprises an inner shaft support, a first shaft sleeve, a second shaft sleeve, an outer shaft support, and an outer sleeve; the outer shaft support is a disk-shaped flange base; a matching through hole is formed in the axis center of the outer shaft support; the inner shaft support is a transmission-type shaft connection part; one or more cylindrical end surfaces are arranged on the inner shaft support; the cylindrical end surfaces are matched with the interior of the matching through hole; the first shaft sleeve and the second shaft sleeve are arranged on the outer shaft support; the first shaft sleeve is matched with the cylindrical end surfaces; the first shaft sleeve sleeves the second shaft sleeves in a floating mode; a circleof transmission teeth are arranged on the rotation surface of the first shaft sleeve; tooth heads which are matched with the transmission teeth are arranged on the inner wall of the second shaft sleeve; the outer sleeve wraps the second shaft sleeve; a protection inner ring is further fixed on the rotation inner wall of the outer sleeve; the protection inner ring sleeves the second shaft sleeve; aball groove is formed in the inner wall of the protection inner ring; rolling balls are arranged between the protection inner ring and the second shaft sleeve, and thus the fiction force is lowered.

The invention discloses a remote determination system of faults of an industrial flow instrument. The system comprises a data acquisition server, a data acquisition gateway, a data record instrument and a flow meter. The data acquisition gateway forwards real-time data of the data record instrument and the flow meter to a backbone network; the data acquisition server obtains data from the backbonenetwork and synchronizes the data to an application server. In addition, the invention also discloses a remote determination method of faults of an industrial flow instrument. The method comprises: collecting real-time data of the operation states of the data acquisition gateway, the data record instrument and an industrial enterprise instrument; on the basis of characteristics of different typesof instruments commonly used in various energy media in the industry, setting corresponding criteria and establishing a determination model; and determining the instrument operation fault based on afault determination model, acquiring a fault signal by using configuration software and carrying out alarming in monitoring software. Therefore, a problem that the industrial instrument fault elimination is not carried out timely and thus the e energy consumption statistics is affected in the prior art is solved.

The invention discloses a biological safety cabinet for monitoring filter leakage in real time. The biological safety cabinet comprises a cabinet body, an air blower, a negative pressure channel and a detecting structure, wherein an air outlet is formed in the top of the cabinet body; the air blower is arranged on the inner upper part of the cabinet body; the negative pressure channel is arranged at the outer side of the rear part of the cabinet body; one end of the negative pressure channel is arranged below the cabinet body, and the other end of the negative pressure channel extends to the top end of the cabinet body along the rear part of the cabinet body; the detecting structure is arranged on a position, positioned on the upper part of a cabinet body working region, in the cabinet body. According to the biological safety cabinet for monitoring filter leakage in real time disclosed by the invention, the detecting structure is arranged in the working region, and a probe for detecting cleanness is fixed on a movable track in the detecting structure and can move in the track, so that in the practical use of a workbench, the cleanness detecting probe scans along the track row by row to realize leakage detection; when leakage exists, a signal is output in real time, so that the equipment can timely emit a sound-light alarm signal to prompt an operator to timely check and maintain a filter.

The invention discloses a power battery monitoring method and device, a server and a storage medium. The method comprises the following steps: acquiring a charging parameter and a temperature parameter of at least one power battery; determining monitoring parameters according to the charging parameters and the temperature parameters; the monitoring parameter is at least used for representing the temperature rise rate of the power battery; determining the health state of the power battery based on the monitoring parameters, wherein the health state represents the fault degree of the power battery. According to the technical scheme provided by the embodiment of the invention, the working state of the working battery, such as the to-be-repaired state and the to-be-observed state, can be determined based on the monitoring parameters, and monitoring of the power battery is realized, so that the power battery is checked and maintained in time, and the use safety of the power battery is guaranteed.

The invention relates to an assembly line sensor displacement detection device with an automatic early warning function, which comprises a machine body, and is characterized in that a fastening plateis movably inserted into the inner wall of a mounting base, a friction chain belt is mounted on the fastening plate through a roller shaft, a protruding plate corresponding to a rotating plate is fixedly connected to the roller shaft, a striking rod is fixedly connected to the bottom of a sliding base, a compressed spring is mounted between the sliding base and a limiting ring, a baffle is movablyinserted below the limiting ring, an inserting rod corresponding to the baffle is fixedly connected to the sliding base, and an alarm bell is fixedly mounted at the bottom of the mounting base. Whena sensor main body deflects left and right, the fastening plate is extruded to move, and the fastening plate extrudes the sliding base to move downwards; when the sensor main body slides downwards, the friction chain belt and the roller shaft are driven to drive the protruding plate to rotate, the protruding plate extrudes the sliding base to move downwards through the rotating plate, the downwards-moving sliding base causes deformation of the compressed spring for energy storage, then the inserting rod extrudes the baffle to move away, the striking rod strikes an alarm bell to give an alarm,and workers are reminded to conduct inspection and maintenance in time. The device is simple in structure is simple and convenient to use.

The invention relates to a testing method for the marginal adaptation of an exposure table of an exposure machine. The testing method mainly comprises the following steps of: mounting a blank film on an exposure table top, wherein the length and the width of the film are smaller than those of the exposure table by 0-1 cun; sucking 1-5 drops of water or alcohol and dripping the water or the alcohol to the four corners and the middle of the film; closing the framework of the exposure table and vacuumizing the frame; and observing the film diffusion condition of the water or the alcohol, and judging whether the marginal adaptation of the framework is qualified or not according to the film diffusion condition of the water or the alcohol for monitoring the marginal adaptation of the exposure table top. By using the method, the defects of single and general monitoring to the vacuum of the table top and poor light leak monitoring effect on a single point or a local area in the prior art can be overcome, and the marginal adaptation of the exposure table of the exposure machine can be monitored for timely point inspection and maintenance so as to prevent light leak in advance.

The invention provides a solar aquaculture water-quality monitoring system, belonging to the field of water-quality monitoring. The solar aquaculture water-quality monitoring system comprises a controller module, a sensor module, a wireless sending module, a storage battery module, a solar module and a remote user module; the output end of the sensor module is connected with the input end of the controller module; the solar module is connected with the power supply ends of the controller module and the wireless sending module through the storage battery module; the input end of the wireless sending module is connected with the output end of the controller module; the wireless sending module is in wireless connection with the remote user module; a water-quality parameter is detected through the sensor module in real time; the wireless sending module transmits the water-quality parameter to the remote user module in a wireless transmission manner, such that the water-quality parameter is checked by a user; the solar module converts solar energy into electric energy; therefore, the electric energy and the wire arrangement expense are saved; and the problem that the existing automatic aquaculture water-quality monitoring system is difficult to arrange wires can be solved.

The invention discloses a billboard monitoring system based on the Internet of Things. The billboard monitoring system comprises a data collecting module, a data monitoring module, a database, an Internet-of-Things service platform, a billboard control module, a warning module, an intelligent terminal and an operation monitoring module; the data collecting module comprises a positioning collectingunit and a brightness collecting unit; the data monitoring module comprises a temperature monitoring unit, a humidity monitoring unit, an image monitoring unit and a flue gas monitoring unit; and thebillboard control module comprises a ventilation control unit, a dehumidification control unit and a brightness adjusting unit. According to the billboard monitoring system, billboard positioning information and environment brightness can be collected, the temperature, the humidity, images and flue gas ingredients in a billboard can be monitored, the operation states of a billboard body, data collecting equipment and data monitoring equipment can be monitored, and the temperature, the humidity and the brightness of the billboard can be adjusted. The invention further provides a using method of the billboard monitoring system based on the Internet of Things, operation is convenient and quick, and promotion is facilitated.

The invention provides a spacecraft transfer test tool management method. The spacecraft transfer test tool management method comprises the steps that 1, a transfer test tool is inquired; 2, selectinga transfer test tool needing to be borrowed and borrowing duration, opening the access grid, and obtaining the transfer test tool; 3, after use, scanning the two-dimensional code confirmation information on the transfer test tool; and step 4, after information confirmation, opening the access grids, and putting a transfer test tool to finish returning. Shared storage is achieved, the utilizationrate is high, and large-scale repeated production is not needed; self-service borrowing and returning are achieved, and the management cost is low; borrowing and returning are conducted at any time, and using efficiency is high; statistics of use times and use time and timely inspection are realized, and safety and reliability of tools are guaranteed.

The invention relates to a closed-loop control loop performance evaluation method based on SFA and Hellinger distance. The closed-loop control loop performance evaluation method comprises the following steps: step 1, acquiring reference data; 2, extracting dynamic information and static information of the reference data by using a slow feature analysis algorithm. The method has the beneficial effects that the dynamic and static information of the operation variables and the controlled variables of the reference data and the to-be-evaluated data is extracted by applying a slow feature analysis(SFA) algorithm, and then the Gaussian mixture model (GMM) of the dynamic and static information is estimated; and finally, the Hellinger distance between the online data and the reference data basedon a Gaussian mixture model are calculated to serve as an evaluation index of the performance of the closed-loop control loop. The problem that control performance evaluation is difficult to accurately carry out due to control logic high coupling and data non-Gaussian distribution in the actual process is solved, the accuracy of dynamic process control performance evaluation is improved, a controlloop can be effectively and timely checked and overhauled, and the reliability of the control loop is improved. Therefore, safe and reliable operation of equipment where the loop is located and the whole industrial process is guaranteed.

The invention relates to a clean bench capable of monitoring leakage in real time. The clean bench comprises a box body, a detection structure, a movement unit and a scanning probe, wherein the box body is of a structure with an opening in one side, and a working area is formed inside the box body; the detection structure is arranged in the box body and is positioned at the upper part of the working area; the detection structure comprises a scanning movement platform which is arranged in the box body and is positioned at the upper part of the working area; the movement unit is arranged in the scanning movement platform; and the scanning probe is arranged on the movement unit. According to the clean bench capable of monitoring the leakage in real time, the detection structure is arranged in the working area, the probe for detecting the cleanliness is fixed on one movement track in the detection structure and can move in the track, the probe for detecting the cleanliness can gradually scan along the track when the clean bench is in actual use and the leakage detection is realized; when the leakage occurs, a signal can be output in real time, and equipment can give a sound-light alarm signal timely to prompt operating personnel to check and maintain timely.

The invention disclose a novel one-piece plastic welding gun. A detachable front cover is arranged on a shell, the front cover is made of an aluminum alloy material, an air outlet is formed in the front cover, an air blower assembly is fixed in the shell and comprises a driving part and centrifugal fan blades, the centrifugal fan blades are arranged towards the front cover, a spring pressing contact type ceramic heating core assembly comprises a ceramic heating core assembly body and a ceramic wiring pin assembly, a detachable flange hollow pipe is arranged at the air outlet of the front cover, the ceramic heating core assembly body is located in the flange hollow pipe, the ceramic heating core assembly body comprises a first ceramic wiring pin base, a ceramic pipe and a ceramic cover which are sequentially arranged in the flange hollow pipe, an electric heating wire is arranged in the first ceramic wiring pin base, the ceramic wiring pin assembly is located in the front cover, and the ceramic wiring pin assembly is detachably and fixedly connected with the first ceramic wiring pin base. After improvement, the product quality of the welding gun is greatly improved, the welding gun has the advantages of being not prone to damage, few in fault, convenient to maintain and replace in time after the electric heating wire is damaged, and higher in working efficiency.

The invention discloses an air supply device capable of ensuring ventilation in a deep pit for mines. The air supply device for mines comprises a first fan, a second fan, a first air pipe and a second air pipe; an end of the first air pipe is communicated with the first fan, the other end is the outlet; one end of the second air pipe is communicated with the second fan, the other end is sealed; several connection pipes are provided between the first air pipe and the second air pipe; on the connection pipes there are single direction air pressure switches which only allow the air to flow from the second air pipe to the first air pipe. The intersection between the second fan and the second air pipe is provided with a pressure detector. The application of the air supply device for mines can ensure the good ventilation in the mine and guarantee the safety of mining operations.

The invention belongs to the technical field of seedbed transfer, and provides an RGV trolley for seedbed transportation and a seedbed transportation line comprising the same. The RGV trolley comprises a frame, wherein a walking mechanism for realizing displacement of the frame on a longitudinal track and a seedbed conveying mechanism for realizing longitudinal sliding of a seedbed on the frame are arranged on the frame, and a seedbed limiting mechanism is further arranged at the end part of the frame; a track butt joint mechanism for being in butt joint with a transverse track, a tow bar driving mechanism for realizing tow bar driving on the transverse track and a seedbed pushing mechanism for pushing the seedbed to transversely slide along the frame are further arranged on the frame, the track butt joint mechanism is provided with two track butt joint pipes which are correspondingly arranged, and the tow bar driving mechanism and the seedbed pushing mechanism are arranged between the two track butt joint pipes. According to the RGV trolley for seedbed transportation and the seedbed transportation line comprising the same, the seedbed is convenient and labor-saving to carry, the transfer cost of the seedbed is reduced, the seedbed is efficiently and orderly carried, the carrying efficiency of the seedbed is greatly improved, and the practicability is high.

The invention discloses a charging pile electric leakage protection system, and relates to the technical field of charging piles. The system comprises a charging pile terminal, a detection data analysis unit and a maintenance scheduling unit, wherein a main control module is arranged in the charging pile terminal, and is electrically connected with a detection module through a conducting wire, thedetection data analysis unit is electrically connected to the output end of the detection module, the output end of the detection module is further electrically connected with an automatic power-offmodule, the automatic power-off module is electrically connected with an execution control module through a conducting wire, the execution control module is electrically connected with a circuit breaker through a conducting wire, the automatic power-off module is electrically connected with an intelligent alarm module through a conducting wire, and the output end of the intelligent alarm module iselectrically connected with a signal transmission module. According to the invention, the intelligent alarm module of the system can carry out electric leakage warning at the charging pile terminal through the audible and visual alarm, and can transmit the electric leakage information to the network server through the signal transmission module.

The invention discloses a quartz glass tube for semiconductor optical fiber, which comprises a thickened sleeve and a quartz glass tube, a No. No. 1 connecting pipe is provided, and No. 2 connecting head is fixedly installed on the outer surface of the other end of the thickened sleeve, and the outer surface of one side of the No. 2 connecting head is provided with No. 2 connecting pipe. The front end of the thickened sleeve A No. 1 reinforced outer ring is provided on the outer surface close to one side, and a No. 2 reinforced outer ring is provided on the front end outer surface of the thickened sleeve near the other side. A quartz glass tube for a semiconductor optical fiber according to the present invention is provided with a No. 2 reinforced outer ring, an observation tube and a waterproof gasket, which can improve the overall structural strength of the entire device, and can facilitate the observation of the internal situation, and can also prevent The water source penetrates into the pipe, which is suitable for different working conditions and brings better prospects for use.

The invention relates to a closed-loop control loop performance evaluation method based on SFA and Hellinger distance, comprising: step 1, acquiring reference data; step 2, using a slow feature analysis algorithm to extract dynamic information and static information of the reference data. The beneficial effect of the present invention is: use the slow feature analysis (SFA) algorithm to extract the dynamic and static information of the operating variable and the controlled variable of the reference data and the data to be evaluated, and then estimate the Gaussian mixture model (GMM) of the dynamic and static information, and finally based on the Gaussian The hybrid model calculates the Hellinger distance between the online data and the reference data as the evaluation index of the closed-loop control loop performance; it solves the problem that the control logic is highly coupled in the actual process and the control performance evaluation caused by the non-Gaussian distribution of the data is difficult to carry out accurately, and improves the dynamic process control. The accuracy of performance evaluation helps to carry out effective and timely inspection and maintenance of the control loop, so as to ensure the safe and reliable operation of the equipment where the loop is located and the entire industrial process.

The invention discloses a distributed Bayesian online fault diagnosis method for the dynamic and static information of a million-kilowatt ultra-supercritical unit. The invention aims at the problem that the fault types of million-kilowatt ultra-supercritical units are difficult to distinguish due to the diversification of fault information, and uses the Bayesian network classifier to capture the static information of the fault, and at the same time, combines the slow feature analysis algorithm to extract the dynamic information of the fault . Finally, an online fault diagnosis model for improving the accuracy of fault diagnosis is constructed by using both dynamic and static fault information. This method overcomes the problem of insufficient fault information extraction caused by too many variables in large-scale coal-fired units, effectively solves the problem of difficult online diagnosis of faults containing diverse dynamic and static fault information, and greatly improves the accuracy of unit faults that are difficult to distinguish. The on-line diagnosis performance helps thermal power plants to carry out effective and timely inspection and maintenance of the plant, thus ensuring the safe and reliable operation of million-kilowatt ultra-supercritical generating units.

The invention relates to the technical field of garden machinery, and particularly discloses a gasoline chain saw with a display function and an information display method. The gasoline chain saw comprises a shell. An air filter, a sparking plug, a fuel filter, an air cylinder, a silencer, an air valve, a gear box, a piston and an oil pump are arranged in the shell. A rotating speed sensor is arranged on the sparking plug, and a first temperature sensor is arranged on the air cylinder. A guide plate is arranged on the shell, a second temperature sensor is arranged on the guide plate, and a sawchain is rotationally arranged on the guide plate. A control panel is arranged on the shell. A rotating speed signal collector, a working time timer and an abnormal time accumulation timer are arranged in the control panel, and the rotating speed signal collector is electrically connected with the rotating speed sensor. A single chip microcomputer is arranged in the shell or the control panel. The control panel is provided with a plurality of display panes which are all electrically connected with the single chip microcomputer. The gasoline chain saw has the advantages that the rotating speedcan be monitored, the operating temperature can also be monitored, and the maintenance reminding function is achieved.